11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * INET An implementation of the TCP/IP protocol suite for the LINUX 31da177e4SLinus Torvalds * operating system. INET is implemented using the BSD Socket 41da177e4SLinus Torvalds * interface as the means of communication with the user level. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Definitions for the protocol dispatcher. 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Version: @(#)protocol.h 1.0.2 05/07/93 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 131da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 141da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 151da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * Changes: 181da177e4SLinus Torvalds * Alan Cox : Added a name field and a frag handler 191da177e4SLinus Torvalds * field for later. 201da177e4SLinus Torvalds * Alan Cox : Cleaned up, and sorted types. 211da177e4SLinus Torvalds * Pedro Roque : inet6 protocols 221da177e4SLinus Torvalds */ 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds #ifndef _PROTOCOL_H 251da177e4SLinus Torvalds #define _PROTOCOL_H 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #include <linux/in6.h> 281da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) 291da177e4SLinus Torvalds #include <linux/ipv6.h> 301da177e4SLinus Torvalds #endif 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds #define MAX_INET_PROTOS 256 /* Must be a power of 2 */ 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds /* This is used to register protocols. */ 361da177e4SLinus Torvalds struct net_protocol { 371da177e4SLinus Torvalds int (*handler)(struct sk_buff *skb); 381da177e4SLinus Torvalds void (*err_handler)(struct sk_buff *skb, u32 info); 39a430a43dSHerbert Xu int (*gso_send_check)(struct sk_buff *skb); 40576a30ebSHerbert Xu struct sk_buff *(*gso_segment)(struct sk_buff *skb, 41576a30ebSHerbert Xu int features); 421da177e4SLinus Torvalds int no_policy; 431da177e4SLinus Torvalds }; 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) 461da177e4SLinus Torvalds struct inet6_protocol 471da177e4SLinus Torvalds { 48e5bbef20SHerbert Xu int (*handler)(struct sk_buff *skb); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds void (*err_handler)(struct sk_buff *skb, 511da177e4SLinus Torvalds struct inet6_skb_parm *opt, 521da177e4SLinus Torvalds int type, int code, int offset, 5304ce6909SAl Viro __be32 info); 54adcfc7d0SHerbert Xu 55a430a43dSHerbert Xu int (*gso_send_check)(struct sk_buff *skb); 56adcfc7d0SHerbert Xu struct sk_buff *(*gso_segment)(struct sk_buff *skb, 57adcfc7d0SHerbert Xu int features); 58adcfc7d0SHerbert Xu 591da177e4SLinus Torvalds unsigned int flags; /* INET6_PROTO_xxx */ 601da177e4SLinus Torvalds }; 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds #define INET6_PROTO_NOPOLICY 0x1 631da177e4SLinus Torvalds #define INET6_PROTO_FINAL 0x2 64adcfc7d0SHerbert Xu /* This should be set for any extension header which is compatible with GSO. */ 65adcfc7d0SHerbert Xu #define INET6_PROTO_GSO_EXTHDR 0x4 661da177e4SLinus Torvalds #endif 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds /* This is used to register socket interfaces for IP protocols. */ 691da177e4SLinus Torvalds struct inet_protosw { 701da177e4SLinus Torvalds struct list_head list; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* These two fields form the lookup key. */ 731da177e4SLinus Torvalds unsigned short type; /* This is the 2nd argument to socket(2). */ 74ee41e2dfSArnaldo Carvalho de Melo unsigned short protocol; /* This is the L4 protocol number. */ 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds struct proto *prot; 7790ddc4f0SEric Dumazet const struct proto_ops *ops; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds int capability; /* Which (if any) capability do 801da177e4SLinus Torvalds * we need to use this socket 811da177e4SLinus Torvalds * interface? 821da177e4SLinus Torvalds */ 831da177e4SLinus Torvalds char no_check; /* checksum on rcv/xmit/none? */ 841da177e4SLinus Torvalds unsigned char flags; /* See INET_PROTOSW_* below. */ 851da177e4SLinus Torvalds }; 861da177e4SLinus Torvalds #define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */ 871da177e4SLinus Torvalds #define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */ 88d83d8461SArnaldo Carvalho de Melo #define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */ 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds extern struct net_protocol *inet_protocol_base; 911da177e4SLinus Torvalds extern struct net_protocol *inet_protos[MAX_INET_PROTOS]; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) 941da177e4SLinus Torvalds extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS]; 951da177e4SLinus Torvalds #endif 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds extern int inet_add_protocol(struct net_protocol *prot, unsigned char num); 981da177e4SLinus Torvalds extern int inet_del_protocol(struct net_protocol *prot, unsigned char num); 991da177e4SLinus Torvalds extern void inet_register_protosw(struct inet_protosw *p); 1001da177e4SLinus Torvalds extern void inet_unregister_protosw(struct inet_protosw *p); 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) 1031da177e4SLinus Torvalds extern int inet6_add_protocol(struct inet6_protocol *prot, unsigned char num); 1041da177e4SLinus Torvalds extern int inet6_del_protocol(struct inet6_protocol *prot, unsigned char num); 10587c3efbfSDaniel Lezcano extern int inet6_register_protosw(struct inet_protosw *p); 1061da177e4SLinus Torvalds extern void inet6_unregister_protosw(struct inet_protosw *p); 1071da177e4SLinus Torvalds #endif 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds #endif /* _PROTOCOL_H */ 110